Archaeolgists have unearthed a suspected Iron Age road in east Anglia which has been preserved in peat for 2,000 years.
The route may have been part of a route across the River Waveney and surrounding wetland at Geldeston in Norfolk.
It is thought the road is pre-Roman, built by the local Iceni tribe. Exact dating has yet to be carried out but tree-ring evidence suggests a date of 75BC.
That dates the timber road to more than 100 years before the Roman invasion, which saw the Iceni and their leader Boudicca lead a revolt which threatened to end Roman rule.
The timber structures, usually lost on archaeological sites, are marked out by the posts which have been preserved in remarkable detail. As they are dug up, they look almost modern, and it is still possible to clearly see tool marks in the timbers.
University of Birmingham archaeological researcher Kristina Krawiec, from the dig team, said: “Instead of getting post holes, we’re getting the posts that would have gone in them. We’re understanding more about the technology and skills that went into these sort of things.”
John Davies, chief curator at Norwich Castle Museum, added: “This particular track way is very interesting to us because we have tools… which may actually tie in with some of the tool marks and methods of construction we are turning up in the excavation.”
Discovered in June last year, the recently excavated timbers form a 4m-wide (13ft) route, running for 500m across wetland right up to the river. There have been two previous linked finds nearby including one on the other side of the river and another running alongside it.